BA307E
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Hazardous area Safe area 2-wire 4/20mA 4 digit indicator I ntrinsically safe for use in all gas & dust hazardous areas u Loop powered only 1.2V drop. Zener barriers or galvanic isolators 2-wire Tx u 4 digit 15mm high 4/20mA circuit Shown with optional backlight - loop powered The BA307E loop powered 4/20mA indicator is a fourth generation instrument that is electrically and mechanically compatible with the earlier industry standard BA307C, but has a much larger full 4 digit display providing maximum visibility from a 96 x 48mm instrument. The new model has guaranteed performance between -40 & 70°C, dust certification and an even shorter enclosure depth than its predecessor. The scale card can easily be marked to show the units of measurement and be installed on-site without dismantling the indicator enclosure or removing it from the panel. If the units of measurement are not specified when the indicator is ordered, a blank scale card will be fitted. The main application of the BA307E is to display a measured variable in meaningful engineering units within a hazardous area. The zero and span of the display are independently adjustable allowing the indicator to be calibrated to display any linear variable represented by the 4/20mA signal. A root extractor and an adjustable sixteen segment lineariser enables the indicator to display flow and non-linear variables such as tank level in linear e n g i n e e r i n g u n i t s . F o r w e i g h i n g applications a tare function is included. A bold 15mm high 4 digit display provides maximum contrast and has a very wide viewing angle, allowing the BA307E indicator to be read easily in most lighting conditions over a wide temperature range. An optional factory fitted backlight is available for applications in poorly illuminated areas. The four digits, with three decimal points and a negative sign, may be configured to display any variable between -9999 and 9999. IP66 front panel protection and a neoprene gasket to seal the joint between the indicator and the panel make the instrument suitable for use in areas that will be cleaned with a hose. To simplify installation and maintenance, the indicator has a removable terminal block allowing panel wiring to be completed before the BA307E indicator is installed. International intrinsic safety certification permits the BA307E to be installed throughout the world. The 4/20mA input terminals comply with the requirements for simple apparatus which, together with the low voltage drop, allow the indicator to be connected in series with most intrinsically safe 4/20mA loops. The BA307E may also be installed in dust hazardous areas. All input safety parameters are the same or greater than those for the preceding BA307C, thus allowing the BA307E to safely replace the earlier model. A backlight which may be loop or separately powered is available as a factory fitted option. It provides green background illumination allowing the display to be read at night or in poorly illuminated areas. When powered from the 4/20mA loop no additional intrinsically safe interface or wiring is required and the indicator input remains compliant with the requirements for simple apparatus. Powering from a separate supply produces a brighter backlight but requires an additional intrinsically safe interface and field wiring. Two backlights may be separately powered from one intrinsically safe interface. ATEX, FM, cFM, INMETRO & IECEx. u ptional backlight & O alarms. u Easy on-site scale card installation. Optional dual alarm outputs which can switch hazardous or safe area loads, such as sounders, beacons or solenoid valves, are available as a factory fitted option. The two galvanically isolated solid state alarm outputs may be independently conditioned as high or low alarms with normally open or closed outputs. Annunciators on the display show the status of both alarm outputs. Reliability is ensured by component conformal coating, protection from incorrect connection and radio frequency interference. The indicator has been subjected to vibration testing and is supported by a three year guarantee. Other models in this range include the BA327E which has a similar specification with five 11mm high digits and a 31 segment bargraph. BEKA associates Ltd. Old Charlton Rd. Hitchin, Hertfordshire, SG5 2DA, U.K. Tel. (01462) 438301 Fax (01462) 453971 e-mail sales@beka.co.uk www.beka.co.uk

Input Current 4 to 20mA Voltage Less than 1.2V at 20°C Less than 1.3V at -40°C Less than 5V with optional loop powered backlight. Overrange ±200mA or ±30V will not damage the indicator. Recommended panel cut-out To achieve an IP66 seal between the instrument and the panel 90 +0.5 / -0.0 x 43.5 +0.5 / -0.0 Scale card Accuracy at 20°C Linear ±0.02% of span ±1digit Root extracting ±16µA at input ±1 digit. Temperature effect on: Zero Less than 25ppm of span/°C Span Less than 50ppm of span/°C Series mode rejection Less than 0.05% of span error for 1mA pk to pk 50 or 60Hz interference....